Syncope – when my dog suddenly faints

Syncope refers to fainting or circulatory collapse that occurs suddenly without warning and leads to a temporary loss of consciousness in animals. The dog collapses suddenly and shows no signs of life. After a short time, it regains consciousness and behaves as it did before the syncope.

INHALT
Cause and origin Symptoms Diagnosis Treatment Forecast Prophylaxis
Cause and origin

Syncope is triggered by reduced blood flow to the brain, which leads to a lack of oxygen in the brain vessels. The causes of this circulatory disorder can be very diverse. However, the main causes primarily include heart disease (cardiac arrhythmia, heart muscle or heart valve disease, heartworm, pericardial effusion), brain disorders (hemorrhages, tumors), blood pressure disorders, respiratory diseases (lung disease, tracheal collapse), and hypoglycemia in diabetes.

Symptoms

In most cases, syncope occurs completely unexpectedly and without any prior signs. The dog suddenly starts to stagger or collapses. Sometimes it is only a matter of seconds before it lies unconscious on its side before recovering just as quickly and behaving completely normally.

Seizures such as epilepsy, which can also lead to temporary loss of consciousness but are usually accompanied by convulsions and uncontrolled defecation and urination, must be distinguished from fainting. Affected dogs often show significantly altered behavior for some time after an epileptic seizure.

Since there is always a risk of sudden cardiac death, especially in cases of cardiac syncope, the animal should be examined by a veterinarian immediately in order to diagnose any underlying conditions as quickly as possible.

Diagnosis

After a general clinical examination and a detailed preliminary report, the attending veterinarian will be able to make an initial diagnosis. However, in order to treat the disease correctly, it is essential to clarify the underlying condition. With the help of auscultation, ECG (long-term ECG if necessary) and ultrasound examination, heart disease can be diagnosed with certainty in most cases. X-rays and blood tests can help to identify respiratory or systemic diseases.

Dog on an ECG
An ECG provides information about underlying heart conditions
Treatment

The treatment used depends on the underlying disease diagnosed and must therefore always be discussed individually with the veterinarian.

Forecast

The chances of recovery also depend greatly on the cause of the syncope. If it can be treated effectively or even eliminated, the prognosis is favorable. In the case of underlying heart disease, the prognosis is generally somewhat poorer.

Prophylaxis

The only form of prevention is regular veterinary check-ups, which help to identify and treat potentially responsible diseases at an early stage.